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    <title>Title</title>
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    <h1>Long OK <a href="/logout">logout</a></h1>
    <h2>CRUD(Create,Retrieve,Update,Delete) Operation</h2>
    <ul>
        <li><a href="/doCreate">Create(添加)</a></li>
        <li><a href="/doRetrieve">Retrieve(查询)</a></li>
        <li><a href="/doUpdate">Update(更新)</a></li>
        <li><a href="/doDelete">Delete(删除)</a></li>

    </ul>
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